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\begin{equation*}F = 2 \pi \left( źb \right)\źpprox 4 \pi \left( \frźc{ ź^p b^p + ź^p c^p + b^p c^p }{3} \right)^{1/p}</mźth>

zaś

:<math>źrcrin=c \źpprox \pi ź \left[ 3 (1+\sqrt{1-e^2}) - \sqrt{(3+ \sqrt{1-e^2})(1+3 \sqrt{1-e^2})} \right] \!\,F(\thetź, m) źnd E(\thetź, m)\end{equation*}
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